Analyzing existing concrete structures reinforced with smooth rebars?
Analyzing existing concrete structures reinforced with smooth rebars?
(OP)
It is my understanding that a lot older concrete structures were reinforced with smooth rebars before deformed bars became the standard practice. Are there any special considerations associated with this when evaluating and analyzing existing concrete structures?
Should you calculate the capacity of members any differently if you know or suspect that smooth rebars were used for reinforcment?
Should you calculate the capacity of members any differently if you know or suspect that smooth rebars were used for reinforcment?






RE: Analyzing existing concrete structures reinforced with smooth rebars?
However check that development length is achieved for the reo bar to yield.
The development length in a plain bar is greater than that for a deformed bar.
RE: Analyzing existing concrete structures reinforced with smooth rebars?
That's my main concern.
Does ACI actually give development length provisions for plain bars? I guess I assumed that wasn't even allowed these days for reinforced concrete construction.
RE: Analyzing existing concrete structures reinforced with smooth rebars?
If I remember correctly, it is usual to consider the bond of a plain bar to be about 2/3 that of a deformed bar. Of course, if there is any oil or impurity on the bar before pouring, all bets are off.
BA
RE: Analyzing existing concrete structures reinforced with smooth rebars?
RE: Analyzing existing concrete structures reinforced with smooth rebars?
RE: Analyzing existing concrete structures reinforced with smooth rebars?
I've seen plain bars in early 1900s buildings, but they did have very small ribs. I've been assuming the ribs aren't nearly equivalent to the deformation standards of today.
RE: Analyzing existing concrete structures reinforced with smooth rebars?
http://www.google.ca/url?sa=t&rct=j&q=&...
BA
RE: Analyzing existing concrete structures reinforced with smooth rebars?